I have a P4 3.0Ghz C (not OC) in a Antec Sonata Case with 2 120mm Fans and my case temp is about 27C and the PSU temp is about 35-38C, but my CPU temp at idle is 45C and underload is about 55-62C. I have remounted the heatsink twice using Artic Silver 5. NOthing seems to help.
What else could I do?